<!doctype html> 
<html> 
<head> 
    <meta charset="utf-8"> 
    <title></title> 
</head>
<body>
<script type="text/javascript">


function show(x,y,z){
	//alert(this)
	this.body.style.background = 'black';
	//alert(x);
};
show.apply(document,[1,2,3]);
//show.call(1);


</script>
</body>
</html>